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e9cafbcc TT |
1 | /* CLI utilities. |
2 | ||
32d0add0 | 3 | Copyright (C) 2011-2015 Free Software Foundation, Inc. |
e9cafbcc TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "cli/cli-utils.h" | |
e9cafbcc TT |
22 | #include "value.h" |
23 | ||
24 | #include <ctype.h> | |
25 | ||
26 | /* *PP is a string denoting a number. Get the number of the. Advance | |
27 | *PP after the string and any trailing whitespace. | |
28 | ||
3bd0f5ef MS |
29 | Currently the string can either be a number, or "$" followed by the |
30 | name of a convenience variable, or ("$" or "$$") followed by digits. | |
e9cafbcc TT |
31 | |
32 | TRAILER is a character which can be found after the number; most | |
33 | commonly this is `-'. If you don't want a trailer, use \0. */ | |
34 | ||
35 | static int | |
e799154c | 36 | get_number_trailer (const char **pp, int trailer) |
e9cafbcc TT |
37 | { |
38 | int retval = 0; /* default */ | |
e799154c | 39 | const char *p = *pp; |
e9cafbcc TT |
40 | |
41 | if (*p == '$') | |
42 | { | |
3bd0f5ef | 43 | struct value *val = value_from_history_ref (p, &p); |
e9cafbcc | 44 | |
3bd0f5ef | 45 | if (val) /* Value history reference */ |
e9cafbcc | 46 | { |
3bd0f5ef MS |
47 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT) |
48 | retval = value_as_long (val); | |
49 | else | |
50 | { | |
2217da06 | 51 | printf_filtered (_("History value must have integer type.\n")); |
3bd0f5ef MS |
52 | retval = 0; |
53 | } | |
54 | } | |
55 | else /* Convenience variable */ | |
56 | { | |
57 | /* Internal variable. Make a copy of the name, so we can | |
58 | null-terminate it to pass to lookup_internalvar(). */ | |
59 | char *varname; | |
e799154c | 60 | const char *start = ++p; |
3bd0f5ef MS |
61 | LONGEST val; |
62 | ||
63 | while (isalnum (*p) || *p == '_') | |
64 | p++; | |
65 | varname = (char *) alloca (p - start + 1); | |
66 | strncpy (varname, start, p - start); | |
67 | varname[p - start] = '\0'; | |
68 | if (get_internalvar_integer (lookup_internalvar (varname), &val)) | |
69 | retval = (int) val; | |
70 | else | |
71 | { | |
72 | printf_filtered (_("Convenience variable must " | |
73 | "have integer value.\n")); | |
74 | retval = 0; | |
75 | } | |
e9cafbcc TT |
76 | } |
77 | } | |
78 | else | |
79 | { | |
80 | if (*p == '-') | |
81 | ++p; | |
82 | while (*p >= '0' && *p <= '9') | |
83 | ++p; | |
84 | if (p == *pp) | |
85 | /* There is no number here. (e.g. "cond a == b"). */ | |
86 | { | |
87 | /* Skip non-numeric token. */ | |
88 | while (*p && !isspace((int) *p)) | |
89 | ++p; | |
90 | /* Return zero, which caller must interpret as error. */ | |
91 | retval = 0; | |
92 | } | |
93 | else | |
94 | retval = atoi (*pp); | |
95 | } | |
96 | if (!(isspace (*p) || *p == '\0' || *p == trailer)) | |
97 | { | |
98 | /* Trailing junk: return 0 and let caller print error msg. */ | |
99 | while (!(isspace (*p) || *p == '\0' || *p == trailer)) | |
100 | ++p; | |
101 | retval = 0; | |
102 | } | |
e799154c | 103 | p = skip_spaces_const (p); |
e9cafbcc TT |
104 | *pp = p; |
105 | return retval; | |
106 | } | |
107 | ||
108 | /* See documentation in cli-utils.h. */ | |
109 | ||
110 | int | |
e799154c | 111 | get_number_const (const char **pp) |
e9cafbcc TT |
112 | { |
113 | return get_number_trailer (pp, '\0'); | |
114 | } | |
115 | ||
116 | /* See documentation in cli-utils.h. */ | |
117 | ||
e799154c TT |
118 | int |
119 | get_number (char **pp) | |
120 | { | |
121 | int result; | |
122 | const char *p = *pp; | |
123 | ||
124 | result = get_number_trailer (&p, '\0'); | |
125 | *pp = (char *) p; | |
126 | return result; | |
127 | } | |
128 | ||
129 | /* See documentation in cli-utils.h. */ | |
130 | ||
197f0a60 TT |
131 | void |
132 | init_number_or_range (struct get_number_or_range_state *state, | |
e799154c | 133 | const char *string) |
e9cafbcc | 134 | { |
197f0a60 TT |
135 | memset (state, 0, sizeof (*state)); |
136 | state->string = string; | |
137 | } | |
138 | ||
139 | /* See documentation in cli-utils.h. */ | |
e9cafbcc | 140 | |
197f0a60 TT |
141 | int |
142 | get_number_or_range (struct get_number_or_range_state *state) | |
143 | { | |
144 | if (*state->string != '-') | |
e9cafbcc | 145 | { |
197f0a60 TT |
146 | /* Default case: state->string is pointing either to a solo |
147 | number, or to the first number of a range. */ | |
148 | state->last_retval = get_number_trailer (&state->string, '-'); | |
149 | if (*state->string == '-') | |
e9cafbcc | 150 | { |
e799154c | 151 | const char **temp; |
e9cafbcc TT |
152 | |
153 | /* This is the start of a range (<number1> - <number2>). | |
154 | Skip the '-', parse and remember the second number, | |
155 | and also remember the end of the final token. */ | |
156 | ||
197f0a60 | 157 | temp = &state->end_ptr; |
e799154c TT |
158 | state->end_ptr = skip_spaces_const (state->string + 1); |
159 | state->end_value = get_number_const (temp); | |
197f0a60 | 160 | if (state->end_value < state->last_retval) |
e9cafbcc TT |
161 | { |
162 | error (_("inverted range")); | |
163 | } | |
197f0a60 | 164 | else if (state->end_value == state->last_retval) |
e9cafbcc TT |
165 | { |
166 | /* Degenerate range (number1 == number2). Advance the | |
167 | token pointer so that the range will be treated as a | |
168 | single number. */ | |
197f0a60 | 169 | state->string = state->end_ptr; |
e9cafbcc TT |
170 | } |
171 | else | |
197f0a60 | 172 | state->in_range = 1; |
e9cafbcc TT |
173 | } |
174 | } | |
197f0a60 | 175 | else if (! state->in_range) |
e9cafbcc TT |
176 | error (_("negative value")); |
177 | else | |
178 | { | |
197f0a60 | 179 | /* state->string points to the '-' that betokens a range. All |
e9cafbcc TT |
180 | number-parsing has already been done. Return the next |
181 | integer value (one greater than the saved previous value). | |
197f0a60 | 182 | Do not advance the token pointer until the end of range |
e9cafbcc TT |
183 | is reached. */ |
184 | ||
197f0a60 | 185 | if (++state->last_retval == state->end_value) |
e9cafbcc TT |
186 | { |
187 | /* End of range reached; advance token pointer. */ | |
197f0a60 TT |
188 | state->string = state->end_ptr; |
189 | state->in_range = 0; | |
e9cafbcc TT |
190 | } |
191 | } | |
197f0a60 TT |
192 | state->finished = *state->string == '\0'; |
193 | return state->last_retval; | |
e9cafbcc TT |
194 | } |
195 | ||
aea5b279 MS |
196 | /* Accept a number and a string-form list of numbers such as is |
197 | accepted by get_number_or_range. Return TRUE if the number is | |
198 | in the list. | |
199 | ||
200 | By definition, an empty list includes all numbers. This is to | |
201 | be interpreted as typing a command such as "delete break" with | |
202 | no arguments. */ | |
203 | ||
204 | int | |
e799154c | 205 | number_is_in_list (const char *list, int number) |
aea5b279 | 206 | { |
197f0a60 TT |
207 | struct get_number_or_range_state state; |
208 | ||
aea5b279 MS |
209 | if (list == NULL || *list == '\0') |
210 | return 1; | |
211 | ||
197f0a60 TT |
212 | init_number_or_range (&state, list); |
213 | while (!state.finished) | |
298f437a | 214 | { |
197f0a60 | 215 | int gotnum = get_number_or_range (&state); |
aea5b279 | 216 | |
298f437a MS |
217 | if (gotnum == 0) |
218 | error (_("Args must be numbers or '$' variables.")); | |
219 | if (gotnum == number) | |
220 | return 1; | |
221 | } | |
aea5b279 MS |
222 | return 0; |
223 | } | |
224 | ||
e9cafbcc TT |
225 | /* See documentation in cli-utils.h. */ |
226 | ||
c00f8484 KS |
227 | char * |
228 | remove_trailing_whitespace (const char *start, char *s) | |
229 | { | |
230 | while (s > start && isspace (*(s - 1))) | |
231 | --s; | |
232 | ||
233 | return s; | |
234 | } | |
55aa24fb SDJ |
235 | |
236 | /* See documentation in cli-utils.h. */ | |
237 | ||
238 | char * | |
b5be8ce0 | 239 | extract_arg_const (const char **arg) |
55aa24fb | 240 | { |
b5be8ce0 | 241 | const char *result; |
55aa24fb SDJ |
242 | |
243 | if (!*arg) | |
244 | return NULL; | |
245 | ||
246 | /* Find the start of the argument. */ | |
b5be8ce0 | 247 | *arg = skip_spaces_const (*arg); |
55aa24fb SDJ |
248 | if (!**arg) |
249 | return NULL; | |
250 | result = *arg; | |
251 | ||
252 | /* Find the end of the argument. */ | |
b5be8ce0 | 253 | *arg = skip_to_space_const (*arg + 1); |
55aa24fb SDJ |
254 | |
255 | if (result == *arg) | |
256 | return NULL; | |
257 | ||
b5be8ce0 JB |
258 | return savestring (result, *arg - result); |
259 | } | |
260 | ||
261 | /* See documentation in cli-utils.h. */ | |
262 | ||
263 | char * | |
264 | extract_arg (char **arg) | |
265 | { | |
266 | const char *arg_const = *arg; | |
267 | char *result; | |
55aa24fb | 268 | |
b5be8ce0 JB |
269 | result = extract_arg_const (&arg_const); |
270 | *arg += arg_const - *arg; | |
271 | return result; | |
55aa24fb | 272 | } |
e6f0bce7 HZ |
273 | |
274 | /* See documentation in cli-utils.h. */ | |
275 | ||
276 | int | |
277 | check_for_argument (char **str, char *arg, int arg_len) | |
278 | { | |
279 | if (strncmp (*str, arg, arg_len) == 0 | |
280 | && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len]))) | |
281 | { | |
282 | *str += arg_len; | |
283 | return 1; | |
284 | } | |
285 | return 0; | |
286 | } |